The 1974 Isle of Man TT motorcycle road races were held between 2-8 June 1973 on the 37-mile Snaefell Mountain Course. It was the fifth round of the 1974 FIM Motorcycle Grand Prix World Championship (now MotoGP).

1974 saw an increasing number of World Championship contenders join the reigning 500cc World Champion Giacomo Agostini in boycotting the Isle of Man TT event over safety concerns. The Formula 750 race was considered as the premier event, replacing the traditional Senior TT as the final race of the week.

Tony Rutter began the week on 3 June by riding a Yamaha TZ 350 to win the Junior TT for the second consecutive year. In the 1000cc Production Class TT held on 4 June, Mick Grant scored a popular victory riding the motorcycle nicknamed Slippery Sam. The victory marked the fourth of five consecutive Isle of Man TT victories for Slippery Sam. BMW riders Hans-Otto Butenuth and Helmut Dähne unexpectedly finished in second and third place riding BMW R90S motorcycles that were better known for their long-distance touring capabilities than their racing credentials.

On 5 June Charlie Williams rode a Yamaha TZ 250 to win the Lightweight TT for the second consecutive year, while in the 500cc Sidecar TT, Rolf Steinhausen set a new lap record lap, but then retired with a mechanical problem allowing Heinz Luthringshauser and Hermann Hahn to win the race. Inclement weather on 6 June saw the Senior TT race distance reduced to 5 laps as Phil Carpenter took the win riding a Yamaha TZ 350. The final race of the week was the Formula 750 TT, Chas Mortimer won the race riding a Yamaha TZ 350 despite competing against motorcycles with 750cc engine capacities, as two-stroke engine technology began to render four-stroke engines obsolete.

World championship races 1974 Isle of Man Junior TT 350cc final standings Tuesday 3 June 1974 – 5 Laps (188.65 Miles) Mountain Course. Place Rider Machine Speed Time Points 1 Tony Rutter Yamaha TZ 350 104.44 mph 1.48.22.2 15 2 Mick Grant Yamaha TZ 350 102.8 mph 1.50.06.2 12 3 Paul Cott Yamaha TZ 350 101.25 mph 1.51.47.0 10 4 Tom Herron Yamaha TZ 350 101.221 mph 1.51.50.0 8 5 Billie Nelson Yamaha TZ 350 100.9 mph 1.52.10.4 6 6 Billy Guthrie Yamaha TZ 350 100.39 mph 1.52.44.8 5 7 Alan Rogers Yamaha TZ 350 99.83 mph 1.53.22.8 4 8 Roger Nichols Yamaha TZ 350 99.39 mph 1.53.52.8 3 9 Phil Gurner Yamaha TZ 350 99.38 mph 1.53.53.0 2 10 Noel Clegg Yamaha TZ 350 99.3 mph 1.53.59.2 1Sources:

1974 Isle of Man Lightweight TT 250cc final standings Wednesday 5 June 1974 – 4 Laps (150.92 Miles) Mountain Course. Place Rider Machine Speed Time Points 1 Charlie Williams Yamaha TZ 250 94.16 mph 1.36.09.8 15 2 Mick Grant Yamaha TZ 250 93.2 mph 1.37.09.2 12 3 Chas Mortimer Yamaha TZ 250 92.85 mph 1.37.31.2 10 4 Tom Herron Yamaha TZ 250 91.41 mph 1.39.03.4 8 5 Tony Rutter Yamaha TZ 250 91.41 mph 1.39.01.2 6 6 Peter McKinley Yamaha TZ 250 90.84 mph 1.39.40.4 5 7 Ian Richards Yamaha TZ 250 90.44 mph 1.40.06.8 4 8 Gerry Mateer Yamaha TZ 250 89.59 mph 1.41.03.8 3 9 Brian Warburton Yamaha TZ 250 89.48 mph 1.41.11.8 2 10 Barry Randle Yamaha TZ 250 89.4 mph 1.41.17.0 1Sources:

1974 Isle of Man Sidecar 500cc TT final standings Wednesday 5 June 1974 – 3 Laps (113.00 Miles) Mountain Course. Place Rider Machine Speed Time Points 1 Heinz Luthringshauser/Hermann Hahn BMW 92.27 mph 1.13.36.2 15 2 George O'Dell/Bill Boldison König 86.21 mph 1.18.46.4 12 3 Dick Hawes/Eddie Kiff Weslake 85.33 mph 1.22.30.8 10 4 Mac Hobson/John Armstrong Yamaha 82.3 mph 1.22.35.0 8 5 Trevor Ireson/Geoff Hunt König 82.2 mph 1.22.37.2 6 6 Bill Crook/Stuart Collins BSA 81.81 mph 1.23.00.6 5 7 Malcolm Aldrick/Michael Skeels Honda 81.27 mph 1.23.33.6 4 8 Ron Perry/Adrian Craig BSA 80.62 mph 1.24.14.2 3 9 Siegfried Schauzu/Wolfgang Kalauch BMW 78.05 mph 1.27.00.6 2 10 Roger Aldous/Peter Lucock Triumph 77.68 mph 1.27.25.4 1Sources:

1974 Isle of Man Senior TT 500cc final standings Thursday 6 June 1974 – 5 Laps (188.65 Miles) Mountain Course. Place Rider Machine Speed Time Points 1 Phil Carpenter Yamaha TZ 350 96.99 mph 1.56.41.6 15 2 Charlie Williams Yamaha TZ 350 96.31 mph 1.57.31.6 12 3 Tony Rutter Yamaha TZ 350 94.35 mph 1.59.57.4 10 4 Billy Guthrie Yamaha TZ 350 92.76 mph 2.02.01.0 8 5 Paul Cott Yamaha TZ 350 92.26 mph 2.02.40.8 6 6 Helmut Kassner Yamaha TZ 350 90.27 mph 2.05.23.0 5 7 Billie Nelson Yamaha TZ 350 90.19 mph 2.05.30.0 4 8 Peter McKinley Yamaha TZ 350 89.99 mph 2.05.46.8 3 9 Selwyn Griffiths Matchless G50 89.31 mph 2.06.43.6 3 10 Geoff Barry Matchless G50 89.31 mph 2.06.43.8 1Sources:

1974 Isle of Man Ultra-Lightweight TT 125cc final standings Thursday 6 June 1974 – 3 Laps (113.19 Miles) Mountain Course. Place Rider Machine Speed Time Points 1 Clive Horton Yamaha TA125 88.44 mph 1.16.47.0 15 2 Ivan Hodgkinson Yamaha TA125 87.68 mph 1.17.27.0 12 3 Tom Herron Yamaha TA125 86.91 mph 1.18.08.6 10 4 Ken Daniels Yamaha TA125 85.67 mph 1.19.16.0 8 5 Fred Launchbury Maico RS-125 85.5 mph 1.19.25.8 6 6 Jan Kostwinder Yamaha TA125 85.1 mph 1.19.48.0 5 7 Bill Kirkwood Maico RS-125 83.32 mph 1.21.30.4 4 8 Anthony Jones BSA 83.24 mph 1.21.35.2 3 9 Rod Gooch Yamaha TA125 82.22 mph 1.22.35.8 2 10 Barrie Dickinson Yamaha TA125 82.03 mph 1.22.47.0 1Sources:

Non-championship races 1974 Isle of Man Sidecar 750cc TT final standings Monday 3 June 1974 – 3 Laps (113.00 Miles) Mountain Course. Place Rider Machine Speed Time 1 Siegfried Schauzu/Wolfgang Kalauch BMW 96.59 mph 1.10.18.4 2 Heinz Luthringshauser/Hermann Hahn BMW 91.93 mph 1.11.52.2 3 Mick Horsepole/G J Horsepole Weslake 88.76 mph 1.16.30.6 4 John Barker/Chris Emmins BSA 88.34 mph 1.16.52.6 5 Bill Crook/Stuart Collins BSA 87.61 mph 1.17.30.0 6 Roy Bell/Gordon Russell König 85.98 mph 1.18.59.2 7 Barrie Moran/Ken Moran Norton 85.92 mph 1.19.02.6 8 Dave Bexley/B. Tyler Honda 85.64 mph 1.19.18.0 9 Heinz Schilling/H. Matthews BMW 84.64 mph 1.21.17.8 10 Mick Wortley/R. Crellin Triumph 83.00 mph 1.21.49.0 Sources:

1974 Isle of Man TT Production 1000cc final standings Tuesday 4 June 1974 – 3 Laps (113.00 Miles) Mountain Course. Place Rider Machine Speed Time 1 Mick Grant "Slippery Sam" 99.72 mph 1.30.48.0 2 Hans-Otto Butenuth BMW R90S 97.7 mph 1.32.41.0 3 Helmut Dähne BMW R90S 97.01 mph 1.33.20.6 4 Geoff Barry Norton Commando 96.85 mph 1.33.29.8 5 Charlie Williams Honda CB750 95.61 mph 1.34.42.2 6 Abe Walsh Triumph Trident 95.48 mph 1.34.49.8 7 Roger Corbett Triumph Trident 94.08 mph 1.36.14.6 8 Graham Bentman Norton Commando 93.21 mph 1.37.08.6 9 Martin Russell BSA Rocket 3 90.12 mph 1.40.28.4 10 Graham Dixon Triumph Trident 88.2 mph 1.42.39.6 Sources:

1974 Isle of Man TT Production 500cc final standings Tuesday 4 June 1974 – 3 Laps (113.00 Miles) Mountain Course. Place Rider Machine Speed Time 1 Keith Martin Kawasaki H1 Mach III 93.85 mph 1.36.28.6 2 Alan Rogers Triumph Tiger 100 93.38 mph 1.36.58.0 3 Phil Gurner BSA B50 92.17 mph 1.38.14.4 4 Neil Tuxworth Honda CB350 91.07 mph 1.39.25.4 5 Roger Sutcliffe Suzuki T500 90.58 mph 1.39.57.6 6 Tom Loughridge Suzuki T500 90.43 mph 1.40.08.0 7 Chris Revett Honda CB350 89.56 mph 1.41.06.4 8 Alan Jackson Jr. Suzuki T500 87.47 mph 1.43.31.2 9 Tony McGurk Honda CB350 87.34 mph 1.43.40.2 10 Peter Crew Honda CB350 85.08 mph 1.46.25.4 Sources:

1974 Isle of Man TT Production 250cc final standings Tuesday 4 June 1974 – 3 Laps (113.00 Miles) Mountain Course. Place Rider Machine Speed Time 1 Martin Sharpe Yamaha RD250 86.94 mph 1.44.09.2 2 Eddie Roberts Yamaha RD250 86.9 mph 1.44.11.4 3 Bill Rae Suzuki GT250 85.93 mph 1.45.226. 4 Godfrey Benson Yamaha RD250 84.04 mph 1.47.54.6 5 John Kiddie Honda CB250 83.22 mph 1.48.48.2 6 Bill Robertson Suzuki GT250 81.33 mph 1.51.19.6 7 Roger Nicholls Ducati 250 Mark 3 81.09 mph 1.51.39.4 8 Bernard Murray Benelli 250 2C 80.05 mph 1.53.07.0 9 Keith Heckles Honda CB250 79.00 mph 1.54.37.0 10 Tom Christian Yamaha RD250 78.87 mph 1.54.48.4 Sources:

1974 Isle of Man Formula 750 Classic final standings Friday 7 June 1974 – 6 Laps (226.38 Miles) Mountain Course. Place Rider Machine Speed Time 1 Chas Mortimer Yamaha TZ 350 100.52 mph 2:15:07.2 2 Charlie Williams Yamaha TZ 350 100.41 mph 2:15:15.8 3 Tony Rutter Yamaha TZ 350 100.08 mph 2:15:42.6 4 Percy Tait Triumph Trident 99.66 mph 2:16:16.8 5 Billy Guthrie Yamaha TZ 350 99.65 mph 2:16:17.8 6 Austin Hockley Yamaha TZ 350 98.28 mph 2:18:11.6 7 Alex George Yamaha TZ 350 97.68 mph 2:19:03.0 8 Noel Clegg Yamaha TZ 350 97.2 mph 2:19:44.0 9 Doug Lunn Ducati 750 95.81 mph 2:21:45.4 10 Derek Chatterton Yamaha TZ 350 95.48 mph 2:22:15.4 Sources:

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External links Detailed race results Mountain Course map